{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:50.999592", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2025-Mar-14_to_2025-Mar-16_89.5_40.0"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2025030000425}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "March 14 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 16 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 56671.37301010535}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["China"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": []}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 40.0}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 89.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "89.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 87.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 90.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[87.0, 41.25], [87.25, 41.15], [87.32, 41.18], [87.47, 41.53], [88.0, 41.75], [88.25, 41.65], [88.5, 41.75], [88.75, 41.65], [89.0, 41.75], [89.53, 41.53], [89.68, 41.18], [89.75, 41.15], [90.0, 41.25], [90.25, 41.15], [90.5, 41.25], [91.03, 41.03], [91.25, 40.5], [91.15, 40.25], [91.25, 40.0], [91.03, 39.47], [90.5, 39.25], [90.25, 39.35], [90.18, 39.32], [90.03, 38.97], [89.5, 38.75], [89.25, 38.85], [89.0, 38.75], [88.75, 38.85], [88.5, 38.75], [88.25, 38.85], [88.0, 38.75], [87.75, 38.85], [87.5, 38.75], [86.97, 38.97], [86.82, 39.32], [86.47, 39.47], [86.25, 40.0], [86.35, 40.25], [86.25, 40.5], [86.47, 41.03], [87.0, 41.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-03-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[86.25, 40.5], [86.47, 41.03], [87.0, 41.25], [87.25, 41.15], [87.32, 41.18], [87.47, 41.53], [88.0, 41.75], [88.25, 41.65], [88.5, 41.75], [88.75, 41.65], [89.0, 41.75], [89.53, 41.53], [89.68, 41.18], [89.75, 41.15], [90.0, 41.25], [90.25, 41.15], [90.5, 41.25], [91.03, 41.03], [91.25, 40.5], [91.15, 40.25], [91.25, 40.0], [91.03, 39.47], [90.5, 39.25], [90.25, 39.35], [90.18, 39.32], [90.03, 38.97], [89.5, 38.75], [89.25, 38.85], [89.0, 38.75], [88.75, 38.85], [88.5, 38.75], [88.25, 38.85], [88.0, 38.75], [87.75, 38.85], [87.5, 38.75], [86.97, 38.97], [86.82, 39.32], [86.47, 39.47], [86.25, 40.0], [86.35, 40.25], [86.25, 40.5]]]]}, "2025-03-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[86.25, 40.5], [86.47, 41.03], [87.0, 41.25], [87.25, 41.15], [87.32, 41.18], [87.47, 41.53], [88.0, 41.75], [88.25, 41.65], [88.5, 41.75], [88.75, 41.65], [89.0, 41.75], [89.53, 41.53], [89.68, 41.18], [89.75, 41.15], [90.0, 41.25], [90.25, 41.15], [90.5, 41.25], [91.03, 41.03], [91.25, 40.5], [91.15, 40.25], [91.25, 40.0], [91.03, 39.47], [90.5, 39.25], [90.25, 39.35], [90.18, 39.32], [90.03, 38.97], [89.5, 38.75], [89.25, 38.85], [89.0, 38.75], [88.75, 38.85], [88.5, 38.75], [88.25, 38.85], [88.0, 38.75], [87.75, 38.85], [87.5, 38.75], [86.97, 38.97], [86.82, 39.32], [86.47, 39.47], [86.25, 40.0], [86.35, 40.25], [86.25, 40.5]]]]}, "2025-03-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[86.25, 40.5], [86.47, 41.03], [87.0, 41.25], [87.25, 41.15], [87.32, 41.18], [87.47, 41.53], [88.0, 41.75], [88.25, 41.65], [88.5, 41.75], [88.75, 41.65], [89.0, 41.75], [89.53, 41.53], [89.68, 41.18], [89.75, 41.15], [90.0, 41.25], [90.25, 41.15], [90.5, 41.25], [91.03, 41.03], [91.25, 40.5], [91.15, 40.25], [91.25, 40.0], [91.03, 39.47], [90.5, 39.25], [90.25, 39.35], [90.18, 39.32], [90.03, 38.97], [89.5, 38.75], [89.25, 38.85], [89.0, 38.75], [88.75, 38.85], [88.5, 38.75], [88.25, 38.85], [88.0, 38.75], [87.75, 38.85], [87.5, 38.75], [86.97, 38.97], [86.82, 39.32], [86.47, 39.47], [86.25, 40.0], [86.35, 40.25], [86.25, 40.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.54958440703507}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.704705781395259}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.0863980611165402, 2.5318012661404623, 3.3674611409505815]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.3520739237467865, 0.6491549173991302, 1.3752024332682709]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.865351625044812, -5.859007059394787, -5.389758659746181]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.411180999183216, -6.54958440703507, -6.227073382373817]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5712129451746675, -1.5240498247772598, -1.4051763370239156]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7056561650776532, -1.7198854233842598, -1.634951727781617]}}